Sodium Tungstate Content
Formula:Na2WO4?2H2O.2H2O
Nature : a white crystalline powder, rhomboidal, mineral spinel structure.In dry air weathering.
Spesification：
Element |
Purity (%) |
ClassⅠ (%) |
ClassⅡ (%) |
Na2WO4.2H2O |
99 |
98 |
97 |
WO3 |
69 |
69 |
68 |
Mo |
0.001 |
0.02 |
-- |
AS |
0.001 |
0.001 |
0.001 |
Cu |
0.0005 |
0.001 |
0.001 |
Fe |
0.001 |
0.001 |
0.005 |
Si |
0.004 |
0.04 |
0.04 |
Water insoluble |
0.005 |
0.05 |
0.05 |
pH |
8.5-9 |
8.5-9 |
8.5-9 |
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0.6um yellow tungsten oxide is a kind of tungsten oxide, with a positive yellow powder appearance, stable properties at normal temperature and apparent density of 0.6-1.0g/cm3.
Ammonium metatungstate(AMT) is an important intermediate compounds of tungsten hydrometallurgical process, appearance is white crystalline powder, solubility in water is the largest in the tungsten compounds which over 300g WO3/100ml H2O (in 25℃).
Sodium tungstate, a tungstate of sodium, is useful as a source of tungsten. It is prepared from tungsten ores used to manufacture tungsten by reducing it.
Purple Tungsten oxide is divided into WO2.72 (or W18O49). It is a kind of tungsten oxide. It is abbreviated as VTO. It is a purple finely grained crystalline powder, and its color usually appears purple or blue purple.